diff --git a/stacks/litellm/compose.yaml b/stacks/litellm/compose.yaml
index 9b874e6..2798e5b 100644
--- a/stacks/litellm/compose.yaml
+++ b/stacks/litellm/compose.yaml
@@ -28,6 +28,13 @@ services:
     image: ghcr.io/berriai/litellm:${LITELLM_TAG:-main-stable}
     container_name: litellm
     restart: unless-stopped
+    # irv-ml1 moved 10.100.79.3 -> 10.6.110.50 on 2026-09-06 (headscale
+    # cutover). The container cannot resolve *.nh3.internal via split-horizon
+    # DNS, so map the fleet-TTS gateway name here rather than re-hardcoding an
+    # IP in the DB model configs (ext-tts / tts-1 / tts-1-hd / gpt-4o-mini-tts,
+    # all openai/zonos). Update this IP if irv-ml1 moves again.
+    extra_hosts:
+      - "irv-ml1.nh3.internal:10.6.110.50"
     ports:
       - "${LITELLM_BIND:-0.0.0.0}:${LITELLM_PORT:-4000}:4000"
     volumes: